Alxanka birta aan lahayn waxay u baahan tahay xulashada gaaska gaashaanka si ay u ilaaliso halabuurka birta ah iyo sifooyinka jidhka iyo farsamada ee la xidhiidha walxaha gaaska caadiga ah ee birta aan lahayn waxaa ka mid ah argon, helium, oxygen, carbon dioxide, nitrogen, iyo hydrogen (fiiri sawirka 1) Gaasasaskan waxaa lagu daraa saamiyo kala duwan si ay ugu habboonaadaan baahiyaha hababka gaarsiinta kala duwan, noocyada fiilada, alwaaxyada saldhigga, profile boodhka la rabo iyo xawaaraha safarka.
Sababo la xiriira kulaylka liidata ee birta ahama iyo ilaa xad "qabow" dabeecadda gaaban wareejinta gaaska birta arc alxanka (GMAW), geeddi-socodka u baahan yahay a "tri-mix" gaaska ka kooban 85% ilaa 90% helium (He), ilaa 10 % Argon (Ar) iyo 2% ilaa 5% Carbon Dioxide, 7-0nd CO2. 2-1 / 2% CO2. Awoodda sare ee ionization ee helium waxay kor u qaadaa arcing ka dib wareeg gaaban;oo ay la socdaan ay conductivity kaamerada sare, isticmaalka waxa uu kordhiyaa dareere ah barkadda dhalaalaysa. The Ar ee Trimix bixisaa gaashaanka guud ee godka alxanka, halka CO2 u dhaqmo sida qayb falcelin si ay u xasiliyaan qaansada (eeg Jaantuska 2 sida kala duwan gaasas gaashaan u saamayn profile kuul alxanka).
Qaar ka mid ah isku dhafka ternary ayaa laga yaabaa inay isticmaalaan oksijiinta sida xasiliye, halka kuwa kale ay isticmaalaan isku-darka He / CO2 / N2 si ay u gaaraan saameyn isku mid ah. Qaar ka mid ah qaybiyeyaasha gaaska ayaa leh gaas gaar ah oo bixiya faa'iidooyinka la ballanqaaday. Ganacsadayaashu waxay sidoo kale ku talinayaan isku-dhafkan hababka kale ee gudbinta oo leh saameyn isku mid ah.
Khaladaadka ugu weyn ee saarayaasha sameeyaan isku dayaya in ay gaaban GMAW ahama birta la isku dar ah gaaska isku dar ah (75 Ar / 25 CO2) sida birta khafiif ah, sida caadiga ah sababtoo ah ma doonayaan in ay maareeyaan cylinders dheeraad ah.This isku dar ah ka kooban carbon aad u badan.In fact, gaas kasta oo gaashaan loo isticmaalo silig adag waa in ay ku jiraan ugu badnaan 5% carbon dioxide.Isticmaalka xaddi ka weyn in natiijada kaarboon carbon ah -fasalka hoos L0. Kaarboonka cesciive ee gaaska gaashaanku waxay samayn kartaa chromium carbides, taas oo yaraynaysa iska caabinta daxalka iyo sifooyinka farsamada.Soot waxay sidoo kale ka muuqan kartaa dusha alxanka.
Sida note dhinaca ah, marka la dooranayo biraha gaabin GMAW ee 300 taxanaha Alloys saldhig (308, 309, 316, 347), saarayaasha waa in ay doortaan grade LSi ah.LSi buuxintii ay leeyihiin content carbon hooseeyo (0.02%) oo sidaas darteed gaar ahaan lagu talinayaa marka ay jirto khatar ah daxalka intergranular.Higher, content silicon caawin wetten ah guryaha sida wetten ee fla e.
Wax-soo-saarayaashu waa inay taxaddaraan marka la isticmaalayo hababka wareejinta gaaban ee gaaban. Isku-dhafka aan dhamaystirnayn wuxuu keeni karaa sababtoo ah arc deminta, samaynta habka hoose ee codsiyada muhiimka ah. Xaaladaha mugga sare, haddii maaddadu ay taageeri karto kuleylkeeda (≥ 1 / 16 inch waa qiyaastii walxaha ugu khafiifsan ee alxanka leh iyadoo la adeegsanayo habka buufinta garaaca wadnaha), garaaca garaaca wadnaha iyo wareejinta ayaa doorbidaya meesha wareejinta WMA. waxay bixisaa fiyuus joogto ah.
Hababkan wareejinta kulaylka sare uma baahna inuu gaaska gaashaanka u dhigowaxay kaloo yaraynaysaa qallooca.
Wareejinta buufinta garaaca ee GMAW, 100% Ar waxay noqon kartaa doorasho la aqbali karo
Barkadda dhalaalaysa ayaa ah mid gaabis ah oo loogu talagalay birta birta ah ee ferritic ah iyo duplex birta birta ah (50/50 ratio of ferrite to austenite) CO2 ama O2 ayaa ku filan inay kordhiyaan maadada oksaydhka, sidaa darteed soosaarayaashu waa inay iska ilaaliyaan iyaga ama u diyaargaroobaan inay waqti badan ku qaataan).Abrasive sababtoo ah oksaydhyadani aad bay u adag yihiin oo buraashka siliga inta badan kama saari doono).
Wax-soo-saarayaashu waxay isticmaalaan fiilooyinka birta aan fiicnayn ee qulqulka leh ee alxanka ka baxsan goobta sababtoo ah nidaamka slag ee fiilooyinkani waxay bixiyaan "shelf" oo taageera barkada alxanka sida ay u adkeyneyso. , waxaa mudan in la ogaado in xawaaraha alxanka ee sare oo dhan iyo heerarka dhigaalka laga yaabo inay yareeyaan kharashka guud ee alxanka. Intaa waxaa dheer, fiilada qulqulka leh waxay isticmaashaa koronto joogto ah oo DC ah, taasoo ka dhigaysa nidaamka alxanka aasaasiga ah mid ka qaalisan oo ka sii adag nidaamyada GMAW ee garaaca.
Wixii 300 iyo 400 taxane ah, 100% Ar ayaa weli ah doorashada caadiga ah ee gaaska tungsten arc alxanka (GTAW) . Inta lagu jiro GTAW ee qaar ka mid ah aluminium nikkel, gaar ahaan hababka makaanaysan, xaddi yar oo hydrogen ah (ilaa 5%) ayaa laga yaabaa in lagu daro si loo kordhiyo xawaaraha safarka (ogow in ka duwan biraha carbon, alloys hydrogen ma u nugul yihiin).
Wixii alxanka superduplex iyo superduplex ahama biraha, 98% Ar / 2% N2 iyo 98% Ar / 3% N2 waa doorashooyin wanaagsan, siday u kala horreeyaan. Helium sidoo kale lagu dari karaa si loo hagaajiyo qoynta by ku saabsan 30% Marka alxanka super duplex ama super duplex ahama biraha, ujeedadu waa in la soo saaro wadajir ah oo leh microstructure isku dheeli tiran iyo 50% ferrite ah formation of qiyaas ahaan . microstructure waxay kuxirantahay heerka qaboojinta, iyo sababta oo ah barkada alxanka TIG si dhakhso ah u qaboojiso, ferrite xad-dhaaf ah ayaa sii jiraya marka 100% Ar la isticmaalo. Marka isku dhafka gaaska ay ku jiraan N2 la isticmaalo, N2 waxay ku kicisaa barkada dhalaalaysa waxayna kor u qaadaa samaynta austenite.
Biraha birta ah waxay u baahan tahay inay ilaaliso labada dhinac ee wadajirka ah si ay u soo saaraan alxan la dhammeeyey oo leh caabbinta ugu badan ee daxalka. Ku guuldareysiga ilaalinta dhabarka waxay keeni kartaa "saccharification," ama oksaydhyo ballaaran oo keeni kara cillad alxan.
Qalabka dabada adag ee si joogta ah u fiican ama xakamaynta adag ee gadaasha gadaasha ayaa laga yaabaa inaanay u baahnayn gaas taageero ah. Halkan, arrinta ugu weyni waa in laga hortago midabaynta xad-dhaafka ah ee aagga kuleylku saameeyay sababtoo ah dhisidda oxide, taas oo markaa u baahan saarista farsamada Qabo
Labada gaas ee taageeraya doorashada waa N2 (ugu raqiisan) iyo Ar (ka qaalisan) .Kuraayadaha yaryar ama marka ilaha Ar ay diyaar u yihiin, waxay noqon kartaa mid aad u habboon in la isticmaalo gaaskan oo aan u qalmin kaydka N2. Ilaa 5% hydrogen ayaa lagu dari karaa si loo yareeyo oxidation. Noocyada kala duwan ee fursadaha ganacsiga ayaa la heli karaa, laakiin taageerooyinka guriga lagu sameeyo iyo biyo-xireennada nadiifinta ayaa caadi ah.
Ku darida 10.5% ama in ka badan chromium waa waxa siiya birta birta ah ee aan nadiifka ahayn takhasus u leh marka aad dooranayso gaaska iyo birta buuxinta alxanka birta aan fiicnayn.
Kala soco wararkii ugu dambeeyay, dhacdooyinka iyo tignoolajiyada dhammaan biraha ka soo baxa labada wargaysyada billaha ah ee u gaar ah shirkadaha Kanadiyaanka ah!
Hadda oo si buuxda loo heli karo daabacaadda dhijitaalka ah ee Canadian Metalworking, si fudud u helista ilaha warshadaha ee qiimaha leh.
Hadda oo si buuxda loo heli karo daabacaadda dhijitaalka ah ee Made in Canada iyo Welding, si fudud u helista ilaha warshadaha ee qiimaha leh.
Waqtiga boostada: Jan-15-2022